> On Mar 20, 2020, at 8:13 AM, Vitaly Cheptsov <chept...@ispras.ru> wrote:
> 
> Hello,
> 
> We noticed that the original bugzilla, which intended to add new LLVM 
> toolchain support[1], also wanted to bring ELF format support with DWARF 
> debugging information. For some reason this did not make its way into EDK II, 
> and we are currently wondering, how can one debug binaries built with LLVM 
> 9.0.
> 
> For macOS and XCODE5 toolchain we use GDB scripts based on Andrei Warkentin’s 
> work, which allow us to integrate with QEMU and VMware[2]. It is likely that 
> they should work with little to no work on Linux with CLANG38/GCC5 with GDB 
> once again. However, CLANGPDB apparently is using PDB debugging information, 
> which I believe is not handled with GDB.
> 
> Could you please provide the details on the matter and let us know about the 
> recommended route?
> — Is dropping CLANGELF just a temporary measure and it should be resubmitted 
> again?
> — Should LLDB, which seems to be aware of PDB, be used instead of GDB, when 
> building with CLANGPDB? If so, did anybody try that?
> 

Vitaly,

I've not tried the CLANGPDB path, but if you want to connect lldb to QEMU you 
need to set  plugin.process.gdb-remote.target-definition-file [1] to [2]. 

[1]  lldb -o "settings set plugin.process.gdb-remote.target-definition-file 
x86_64_target_definition.py" -o "gdb-remote 9000"
[2] 
https://github.com/llvm-mirror/lldb/blob/master/examples/python/x86_64_target_definition.py

Thanks,

Andrew Fish

> Thanks!
> 
> Best regards,
> Vitaly
> 
> [1] https://bugzilla.tianocore.org/show_bug.cgi?id=1603 
> <https://bugzilla.tianocore.org/show_bug.cgi?id=1603>
> [2] 
> https://github.com/acidanthera/OpenCorePkg/blob/master/Debug/Scripts/gdb_uefi.py
>  
> <https://github.com/acidanthera/OpenCorePkg/blob/master/Debug/Scripts/gdb_uefi.py>
> 
> 


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